Lens Adapter PL Mount LA-PL-1 (no LDS) 45
10 Optics
ALEXA is equipped with an exchangeable lens mount.
Note: Lenses must cover an image circle of at least 30 mm diameter to eliminate the
risk of vignetting.
10.1 Lens Adapter PL Mount LA-PL-1 (no
LDS)
The lens adapter LA-PL-1 is the standard lens mount delivered with ALEXA.
It can be used to attach any modern PL-mount lens to the camera.
Attaching a lens to the camera
Twist the bayonet ring anti-clockwise as far as it will go.
Remove the protective lens cap.
Insert the lens into the lens mount receptacle without catching it at the
edges. One of the four slots on the lens mount must fit over the index
pin in the lens mount receptacle.
Choose a lens position that gives good readability of lens markings.
Press the lens flat onto the lens mount receptacle.
Twist the bayonet ring clockwise until the lens is attached.
Make sure the lens is properly mounted.
Note: When no lens is attached to the camera, use the protective cap to avoid dust
entering the lens cavity.
Note: The sophisticated design principle of the camera’s optical module delivers
outstanding images with a cinematic look and feel, but also makes the imager
sensitive to contamination. Dust particles that have settled on the sensor cover glass
during a lens change may become visible as dark spots in the output image, similar
to lint leaving marks on exposed film. The degree of this effect depends on the
aperture of the lens.
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